return 0;
}
+
+/**
+ * Write to non-volatile storage device
+ *
+ * @v nvs NVS device
+ * @v address Address to which to write
+ * @v data Data buffer
+ * @v len Length of data buffer
+ * @ret rc Return status code
+ */
+int nvs_write ( struct nvs_device *nvs, unsigned int address,
+ const void *data, size_t len ) {
+ size_t frag_len;
+ int rc;
+
+ /* We don't even attempt to handle buffer lengths that aren't
+ * an integral number of words.
+ */
+ assert ( ( len & ( ( 1 << nvs->word_len_log2 ) - 1 ) ) == 0 );
+
+ while ( len ) {
+
+ /* Calculate space remaining up to next block boundary */
+ frag_len = ( ( nvs->block_size -
+ ( address & ( nvs->block_size - 1 ) ) )
+ << nvs->word_len_log2 );
+
+ /* Limit to space remaining in buffer */
+ if ( frag_len > len )
+ frag_len = len;
+
+ /* Read this portion of the buffer from the device */
+ if ( ( rc = nvs->write ( nvs, address, data, frag_len ) ) != 0)
+ return rc;
+
+ /* Update parameters */
+ data += frag_len;
+ address += ( frag_len >> nvs->word_len_log2 );
+ len -= frag_len;
+ }
+
+ return 0;
+}